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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPCXX_SUPPORT_CHANNEL_ARGUMENTS_H
#define GRPCXX_SUPPORT_CHANNEL_ARGUMENTS_H
#include <list>
#include <vector>
#include <grpc++/support/config.h>
#include <grpc/compression.h>
#include <grpc/grpc.h>
namespace grpc {
namespace testing {
class ChannelArgumentsTest;
} // namespace testing
class ResourceQuota;
/// Options for channel creation. The user can use generic setters to pass
/// key value pairs down to c channel creation code. For grpc related options,
/// concrete setters are provided.
class ChannelArguments {
public:
ChannelArguments();
~ChannelArguments() {}
ChannelArguments(const ChannelArguments& other);
ChannelArguments& operator=(ChannelArguments other) {
Swap(other);
return *this;
}
void Swap(ChannelArguments& other);
/// Dump arguments in this instance to \a channel_args. Does not take
/// ownership of \a channel_args.
///
/// Note that the underlying arguments are shared. Changes made to either \a
/// channel_args or this instance would be reflected on both.
void SetChannelArgs(grpc_channel_args* channel_args) const;
// gRPC specific channel argument setters
/// Set target name override for SSL host name checking. This option is for
/// testing only and should never be used in production.
void SetSslTargetNameOverride(const grpc::string& name);
// TODO(yangg) add flow control options
/// Set the compression algorithm for the channel.
void SetCompressionAlgorithm(grpc_compression_algorithm algorithm);
/// The given string will be sent at the front of the user agent string.
void SetUserAgentPrefix(const grpc::string& user_agent_prefix);
/// The given buffer pool will be attached to the constructed channel
void SetResourceQuota(const ResourceQuota& resource_quota);
/// Set LB policy name.
/// Note that if the name resolver returns only balancer addresses, the
/// grpclb LB policy will be used, regardless of what is specified here.
void SetLoadBalancingPolicyName(const grpc::string& lb_policy_name);
// Generic channel argument setters. Only for advanced use cases.
/// Set an integer argument \a value under \a key.
void SetInt(const grpc::string& key, int value);
// Generic channel argument setter. Only for advanced use cases.
/// Set a pointer argument \a value under \a key. Owership is not transferred.
void SetPointer(const grpc::string& key, void* value);
void SetPointerWithVtable(const grpc::string& key, void* value,
const grpc_arg_pointer_vtable* vtable);
/// Set a textual argument \a value under \a key.
void SetString(const grpc::string& key, const grpc::string& value);
private:
friend class SecureChannelCredentials;
friend class testing::ChannelArgumentsTest;
/// Default pointer argument operations.
struct PointerVtableMembers {
static void* Copy(void* in) { return in; }
static void Destroy(void* in) {}
static int Compare(void* a, void* b) {
if (a < b) return -1;
if (a > b) return 1;
return 0;
}
};
// Returns empty string when it is not set.
grpc::string GetSslTargetNameOverride() const;
std::vector<grpc_arg> args_;
std::list<grpc::string> strings_;
};
} // namespace grpc
#endif // GRPCXX_SUPPORT_CHANNEL_ARGUMENTS_H
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